Hi all, I have the following scenario (I am working in UNIX btw): There is a command line located in a text file (say test.txt). The particular line that contains the command line looks like this: Arg: -option_a /old_path/abc -option_b /old_path/def -option_c /old_path/ghi (The line will ALWAYS start with "Arg:" and it may contain 20 options. I am only listing 3 here) Now I want to take all those options available and change the paths. For example I want "-option_a /new_path/test.in" and I know this particular option only takes extension .in and I know where the file is located (say /new_path/test.in) and that new_path directory contains only 1 .in file. Is there a way to do this? The final result will look something like this: -option_a /new_path/test.in -option_b /new_path/test.out -option_c /new_path/test.log (one additional information: I may not know the exact filename for test.in but there is only one .in file in the /new_path/ directory so this particular file will only be used for -option_a, the same goes to option_b and option_c) Any help/suggestion is greatly appreciated. Thank you!